January 23, 200620 yr I`VE JUST BOUGHT AN `04 290,AND HAVING PROBLEMS STARTING (HOT AND COLD)I TOOK AIR FILTER OUT-LOOKS LIKE NEW,TOOK CARB OFF-LOVELY AND CLEAN,ONLY TING I COULD SEE WRONG IS THE BRASS FITTING IN THE CENTER OF THE CARB(WHERE THE NEEDLE GOES IN)hAS HAD THE FRONT MACHINED AWAY,SO INSTEAD OF BEING ROUND(LOOKING DOWN THROUGH THE SLIDER BORE)THERE IS ONLY HALF OF IT THERE.iS THIS NORMAL??iF NOT,WHATS GOIN ON?? ANY HELP ON GETTING IT TO START BETTER WOULD BE MUCH APPRECIATED
January 23, 200620 yr No need to yell. Make sure nothing is obstructing the enrichener lever from going all the way up. Use NO throttle when kicking.
January 23, 200620 yr I find that mine is difficult to start. Try starting in neutral and give it a good kick, usually works for me.
January 23, 200620 yr Did you buy it from NC/NCB Racing off ebay? I was bidding on that but it went for more than I expected.
January 23, 200620 yr On the starting problem theme,as any one tried the NGK platinum plug?BR5EVX i think.
January 24, 200620 yr Yes a vx is good, not a jot of difference with starting but seems to run cleaner everywhere else. Works on my Gas Gas too. Don't think this is a sherco problem but a maintainence issue. Strip thr carb put a new plug in make sure the air filter is new/very clean, take the mag cover off and the flywheel dry and clean all back to gether and off you go. If the problem still persists then you need someone handy to look more at things like compression and timing. YOU ALWAYS START SHERCOS FIRST THING IN NEUTRAL OR ELSE!
January 24, 200620 yr Plugged pilot jet often causes hard starting on the sherco, simple test, try giving it a little choke to start it when the bike is warmed up, if she starts better, then clean carb and blow the jets out well.
January 24, 200620 yr Author cleaned carb etc,put fresh petrol in...started 3rd kick this morn without twisting throttle.Cant realy moan about that.(my old`92 gasser still starts 1st kick EVERY time!I think i`ve been spoilt).Tried to start the sherco after leaving it stopped for half an hour and the bugger wouldnt start without the choke!!.The carb is definatly clean,done the compressed air etc.I`l play about with the mixture screw and see if things improve, Thanks for the help. Oh yes RTURNER 51,i did get it from NTB.Bet you glad you didnt eh?? Seriously though,its in mint condition,totaly un-marked,just doesnt start like me old gasser!! Edited January 24, 200620 yr by gasgasssser
January 24, 200620 yr Try going to a bigger pilot jet. If it is on the lean side at idle it will be harder to start.
January 24, 200620 yr My 04 290 starts/runs best with mixture screw 3 turns out,3rd kick cold,as already posted IN NEUTRAL,1ST kick after that in or out of gear,will soon be for sale on here.
January 24, 200620 yr Don't mean to be the bearer of bad news but.... I've heard of a few 04 shercos with weak spark problems.. just a worst case scenario thing. I owned a 250 '04 with a poor spark-- try closing the plug gap.The symptoms you describe for poor starting are the same as I had on my '04. Hope i'm wrong! it's been known before!
January 24, 200620 yr Just in case the thread goes down the line of the "Common Problem" I know of a few 04 Sherco's, my own included, never misses a beat. The carburation is one thing I have been reeeeaaaally impressed with. Sweet! Admittedly i can go a bit over the top with the jetwash on the odd occasion, and lazily decide it just needs a quick filter swap I know, inexcusable. I normally know within the first section or two, and dart back to the car - mudguard, airbox, carb off, drop the float bowl, blow it out and all back on, and Even holding an umbrella above it it's 10 minutes max. I can 99% guarantee problem sorted. If I let the fuel get through while I put the mudguard back i can almost guarantee first kick every time. This is with all bog standard jets etc. Plug is probably a year old (I carry one with me so if it ain't broke I don't fix it) The only other single problem I've had is the choke sticking up slightly - happened twice, so no major problem, lever just needed pushing home, but I thought the worst and stripped it down One other Sherco I saw with problems had a dodgy connection between HT lead and plug cap. Sounds like I'm gloating here, but not intended that way, just letting you know that the target should be near perfection, so if you're not getting that, keep looking. Be good to hear what it turns out to be. Good luck. P.S. I wouldn't expect mine to start without choke after half an hour to cool down either. It'd be cold again. Did I miss summat? Edited January 24, 200620 yr by bikespace
January 25, 200620 yr Author Thanks for all that,it probably boils down to having a new bike,which needs a slightly diffrent technique to start it etc and worrying that somethings not right.Ive no doubt cleaning the carb has helped.I went into the garage tonight,and it started 3rd kick again,5 mins later..1st kick,so hopefully thats job done.
January 25, 200620 yr I have heard of some folks enlarging the enrichment jet to help improve starting in cold whether. I think you have to drill it out a bit. Migh t see if someone has done it?
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.